On occasion, you may need to remove stored web pages and their content. Each browser has its own cache:
Delete Browser Cache: Internet Explorer
In Internet Explorer, tap or click the Tools button and then tap or click Internet options
On the General tab, under Browsing history, click the Delete button.
Ensure that Temporary Internet files and website files & Cookies and website data check boxes are selected, then click Delete.
Close and relaunch Internet Explorer.
Delete Browser Cache: Firefox
In Firefox, open Menu>Options
Select the Advanced panel>Network Tab and click on Clear Now
Click on the Network tab.
In the Cached Web Content section, click Clear Now.
Close the about:preferences page. Any changes you’ve made will automatically be saved